> The article implied that the automated system would allow for
> /shorter paths/ (the shortest path is the great circle, so this
> statement indicates that trans-oceanic flights are not using great
> circle/GPS routing). Most likely, the flights are using 50 minute "plumb
> lines", with a he
Howard Butler http://hobu.biz/ has some nice Python wrappers for gdal
and Frank Warmerdam's other tools. I have to say, though, that geodesy
is inherently complicated. Python makes it easy to program, but not
easy to understand. http://maps.hobu.net:7080/RPC2 is an XMLRPC service
that he exposes th
Dennis Lee Bieber wrote:
> Of course, the great circle arc, except for paths with start/end
> latitude of 0 (equator) or with (lon1 - lon2) = 0, require a constant
> variation in compass heading -- and I don't think IFR currently make use
> of great circle arcs (and GPS to maintain them).
I'
Rocco Moretti wrote:
> Tim Daneliuk wrote:
>
>> Diez B. Roggisch wrote:
>>
>>> Tim Daneliuk wrote:
>>>
Casey Hawthorne wrote:
>
> Do your planes fly over the earth's surface or through the ground?
Why do you presume this has anything to do with airp
Paul Rubin wrote:
> Tim Daneliuk <[EMAIL PROTECTED]> writes:
>
>>Huh? When traversing along the surface of the earth, it's curvature
>>is relevant in computing total distance. An airplane flies more-or-less
>>in a straight line above that curvature. For sufficiently long airplane
>>routes (wh
|
| 1) Given the latitude/longitude of two locations, compute the distance
|between them.
|
| "Distance" in this case would be either the straight-line
|flying distance, or the actual over-ground distance that accounts
|for the earth's curvature.
# ---
Tim Daneliuk <[EMAIL PROTECTED]> writes:
> Huh? When traversing along the surface of the earth, it's curvature
> is relevant in computing total distance. An airplane flies more-or-less
> in a straight line above that curvature. For sufficiently long airplane
> routes (where the ascent/descent d
Tim Daneliuk wrote:
> Diez B. Roggisch wrote:
>
>> Tim Daneliuk wrote:
>>
>>> Casey Hawthorne wrote:
>>>
Do your planes fly over the earth's surface or through the ground?
>>>
>>>
>>>
>>>
>>> Why do you presume this has anything to do with airplanes?
>>>
>>
>> That was supposed to be a f
Diez B. Roggisch wrote:
> Tim Daneliuk wrote:
>
>> Casey Hawthorne wrote:
>>
>>>
>>> Do your planes fly over the earth's surface or through the ground?
>>
>>
>>
>> Why do you presume this has anything to do with airplanes?
>>
>
> That was supposed to be a funny remark regarding that your
> "str
> For spherical earth, this is easy, just treat the 2 locations as
> vectors whose origin is at the center of the earth and whose length is
> the radius of the earth. Convert the lat-long to 3-D rectangular
> coordinates and now the angle between the vectors is
> arccos(x dotproduct y). The over
Tim Daneliuk wrote:
> Casey Hawthorne wrote:
>>
>> Do your planes fly over the earth's surface or through the ground?
>
>
> Why do you presume this has anything to do with airplanes?
>
That was supposed to be a funny remark regarding that your
"straight-line-distance" makes no sense at all -
Casey Hawthorne wrote:
> Tim Daneliuk <[EMAIL PROTECTED]> wrote:
>
>
>>Is anyone aware of freely available Python modules that can do any of
>>the following tasks:
>>
>>1) Given the latitude/longitude of two locations, compute the distance
>> between them. "Distance" in this case would be eith
Tim Daneliuk <[EMAIL PROTECTED]> writes:
> 1) Given the latitude/longitude of two locations, compute the distance
> between them. "Distance" in this case would be either the straight-line
> flying distance, or the actual over-ground distance that accounts for
> the earth's curvature.
Tim Daneliuk <[EMAIL PROTECTED]> wrote:
>Is anyone aware of freely available Python modules that can do any of
>the following tasks:
>
>1) Given the latitude/longitude of two locations, compute the distance
>between them. "Distance" in this case would be either the straight-line
>flying d
Is anyone aware of freely available Python modules that can do any of
the following tasks:
1) Given the latitude/longitude of two locations, compute the distance
between them. "Distance" in this case would be either the straight-line
flying distance, or the actual over-ground distance tha
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